Respuesta :

Answer:

Step-by-step explanation:

y=n(a+1)/n

y/n=a+1

-1   -1

y/n-1=a

y = n(a+1)

y = na+1n

y = na+n

y-n = na

(y-n)/n = a

y/n - n/n = a

y/n - 1/1 = a

y/n = a